use newer JDK

(requires at least JDK 13, JDK 12.0.1 or JDK 11.0.3 - see https://bugs.openjdk.java.net/browse/JDK-8212233)

Author: overheadhunter

.travis.yml

@@ -1,8 +1,8 @@
-dist: xenial
+dist: bionic
 language: java
 sudo: false
 jdk:
-- openjdk11
+- openjdk13
 env:
   global:
   - secure: "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" # CODACY_PROJECT_TOKEN